current long span bridges

Current Long Span Bridges

This final lecture outlines some of the various LSBs currently under construction around the world (Spring 2015).

Presentation at university of Surrey May 2015 byDavid Collings BSc CEng FICEMaking the complex simple

Current Long Span Bridges

This final lecture outlines some of the various LSBs currently under construction around the world (Spring 2015).

David Collings BSc CEng FICEMaking the complex simple

Sungai Brunei Bridge

I had previously prepared a design for a bridge on this site, it was good to see this 300m span bridge underway April 2015). The pylon is halfway up and the deck just being started. The design uses a concrete box girder on a single inverted Y concrete pylon.

1 2 Access to the bridge is best by water.4 3

Queensferry Bridge

This bridge the 3rd bridge across the Fourth of Firth. It has a couple of spans of 650m. These images from Scottish.gov and twitter.

Rabat Bridge

I came across this 376m span cable stay bridge a few years ago, the unusual towers are now complete and the deck cantilevering almost finished.

Izmit Bay Bridge

Another bridge I did a little work on a few years ago. The 1550m span bridge across Izmit Bay is coming on the viaducts are progressing and the main bridge towers complete and cables being laid.

The top of the tower looking down. The cable saddles can be seen.

Halogaland Suspension Bridge

This 1145m span bridge is interesting in it will bring the cables together over the tower, improving torsional response but maybe making deck construction more difficult. The following image is a little dark and the tower is not high enough to stand out.

HZM Bridges

It has been a few years since I have been to Zhuhai, the bridges across the delta are now progressing. One (left) is well advanced and has a slender tower by using saddle technology (avoiding anchorages and a hollow pylon). The other sail tower (above) is not yet above deck. I hope to see both more complete on next years visit.

David Collings BSc CEng FICEMaking the complex simple

Lusail Bridges

I did some work on construction sequences for these odd looking bridges a while ago. I was reminded of this on a recent visit (Jan 2015). They are some of a number of bridges in the Middle East (and elsewhere) where engineers are being led in odd directions.

David Collings BSc CEng FICEMaking the complex simple

3rd Bosporus Bridge

This 1408m span is billed online as a suspension bridge with tall towers, but is a hybrid with a mainly cable stayed deck. Often combined in early bridges this hybrid stay-suspension form gives a stiffer structure and is likely to be more common in future suspension bridges.

David Collings BSc CEng FICEMaking the complex simple

Current Long Span Bridges

I will update this lecture for next year, if you are aware of an interesting LSB under construction please let me know via Linkedin.

David Collings BSc CEng FICEMaking the complex simple

Presentation by CRD and Wolf productions.